1. 서론
This manual provides essential information for the safe and effective installation, operation, and maintenance of the MARS - Motors & Armatures 61472 Definite Purpose Contactor. This 3-pole contactor is designed for specific applications, featuring a 208-240V coil voltage (50/60Hz) and suitable for inductive loads up to 60 FLA and resistive loads up to 75 FLA. It is equipped with box lug/dual QC terminals and meets UL standards. Please read this manual thoroughly before any installation or operation.
2. 안전 정보
경고: Electrical shock hazard. Installation and servicing should only be performed by qualified personnel. Disconnect all power before installing or servicing this device. Failure to follow these instructions may result in serious injury or death.
- Always ensure power is disconnected at the source before working on the contactor or associated wiring.
- 절연 장갑과 안전 안경을 포함한 적절한 개인 보호 장비(PPE)를 착용하세요.
- 올바른 볼륨 확인tage and current ratings before installation to prevent damage to the contactor or connected equipment.
- 모든 배선 연결이 안전하고 현지 전기 규정을 준수하는지 확인하세요.
- This contactor is designed for definite purpose applications. Do not use it for general-purpose switching unless specified.
3. 제품 오버view
The MARS 61472 contactor is a robust electrical switching device used to control high-current loads, typically in HVAC, refrigeration, or motor control applications. It operates by using a low-power control signal to switch a higher-power circuit.
3.1. 구성 요소 및 라벨링
그림 1: MARS 61472 Definite Purpose Contactor. This image displays the main body of the contactor, including its three power poles with box lug terminals and dual quick-connect (QC) terminals. The top label clearly indicates the model number "61460" (note: the product is 61472, but the image shows 61460, this is a discrepancy to note), coil voltage "24VAC 50Hz / 24VAC 60Hz", and various electrical ratings such as FLA (Full Load Amps), LRA (Locked Rotor Amps), RES (Resistive Amps), and Horsepower (HP) ratings for 1-phase and 3-phase applications. It also specifies torque requirements for screws (45 Lb-in) and lugs (50 Lb-in), and indicates UL certification for use with Cu 75°C wire.
4. 설정 및 설치
접촉기의 안전하고 안정적인 작동을 위해서는 적절한 설치가 매우 중요합니다.
4.1. 장착
- Mount the contactor on a flat, stable surface using appropriate fasteners through the mounting holes on its base.
- Ensure adequate clearance around the contactor for ventilation and wiring.
4.2. 배선 연결
- 전원 회로 배선: Connect the main power lines to the appropriate power terminals (L1, L2, L3) and the load to the corresponding load terminals (T1, T2, T3). This contactor has 3 poles.
- Coil Circuit Wiring: 제어 볼륨 연결tage (208-240V AC, 50/60Hz) to the coil terminals. Refer to the contactor's label for exact coil voltag사양
- 터미널 유형: This unit features box lug terminals for main power connections and dual quick-connect (QC) terminals per pole for auxiliary connections or control wiring.
- 토크 사양:
- Torque for Screws: 45 Lb-in
- Torque for Lugs: 50 Lb-in
- 와이어 유형: Use copper (Cu) wire rated for 75°C or higher.
- UL 표준: Ensure all wiring and installation practices comply with UL standards and local electrical codes.
5. 작동 원리
The MARS 61472 contactor operates on the principle of electromagnetism. When the specified control voltage (208-240V AC) is applied to the coil terminals, an electromagnetic field is generated. This field pulls an armature, causing the main power contacts to close, thereby allowing current to flow through the connected load. When the control voltage is removed, the electromagnetic field collapses, and springs return the contacts to their open position, interrupting the power to the load.
This definite purpose contactor is specifically designed for applications such as motor starting, heating, and lighting, where the load characteristics are well-defined.
6. 유지관리
Regular inspection and maintenance can extend the lifespan of your contactor and ensure safe operation.
- 전원 차단: Always disconnect all power to the contactor before performing any maintenance.
- 시각적 검사: Periodically inspect the contactor for signs of wear, discoloration, arcing, or loose connections. Check for any foreign objects or debris.
- 단자 견고성: Re-check the tightness of all terminal connections annually, ensuring they meet the specified torque values (45 Lb-in for screws, 50 Lb-in for lugs).
- 접촉 조건: While power is off, visually inspect the main contacts for excessive pitting or erosion. Severely pitted contacts may indicate the need for replacement.
- 청소: Keep the contactor clean and free of dust and moisture. Use a dry, non-conductive brush or compressed air for cleaning.
7. 문제 해결
이 섹션에서는 일반적인 문제에 대한 지침을 제공합니다. 복잡한 문제의 경우 자격을 갖춘 전기 기술자와 상담하세요.
| 문제 | 가능한 원인 | 해결책 |
|---|---|---|
| Contactor does not pull in (contacts do not close) |
|
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| 접촉기가 큰 소리로 윙윙거리거나 덜컹거립니다. |
|
|
| 접촉기 접점이 과열되거나 용접됨 |
|
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8. 사양
| 기인하다 | 값 |
|---|---|
| 모델 번호 | 61472 |
| 접촉기 유형 | 명확한 목적 |
| 극 수 | 3 |
| FLA Inductive Amps | 60A |
| FLA Resistive Amps | 75A |
| 코일 권tage | 208-240V AC |
| Coil Frequency | 50/60Hz |
| 터미널 유형 | Box Lug / Dual Quick Connect (QC) |
| Number of QC Terminals per Pole | 2 |
| 치수(높이 x 너비 x 깊이) | 3.11 x 2.87 x 4.04 인치 |
| 품목 무게 | 1 파운드 |
| 재료 | 구리(단자) |
| 표준 | UL 인증 |
| 권장 전선 유형 | Cu 75°C wire |
| Torque for Screws | 45파운드-인치 |
| Torque for Lugs | 50파운드-인치 |
| 제조업체 | 화성 - 모터 및 전기자, Inc. |
Note: The product image label shows model 61460, but the product description and specifications confirm the model is 61472. Please refer to the product packaging and official documentation for the most accurate model number.
9. 보증 및 지원
For information regarding product warranty, returns, or technical support, please contact MARS - Motors & Armatures, Inc. directly or refer to their official web사이트. 구매 증빙 자료로 구매 영수증을 보관하세요.
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